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Fat Free CRM

Fat Free CRM is a free, MIT-licensed, self-hosted CRM platform built on Ruby on Rails, offering contact management, lead and campaign management, account management, and opportunity tracking. It supports team collaboration, custom fields, and is extensible via Rails Engine plugins.

3.2/5sales-pipelineFree (self-hosted)

Our verdict

Last verified Jun 12, 2026

Actively maintained (v0.28.0 April 2025, Rails 8 upgrade) with consistent feature additions, strong Rails community, and zero cost; niche Ruby/Rails audience and limited integration breadth hold back scores.

Rating
3.2/5
Editorial score
Users
0
Verified users
Starting at
Free (self-hosted)
open-source
Category
sales-pipeline
Market segment

Key Features

Contact and account management
Lead and campaign management
Opportunity tracking with group collaboration
Task management (calls, meetings, follow-ups)
Custom fields for all core objects
Tag-based contact organization
Rails Engine plugin system (webhooks, time tracking, record merging)
CSS grid UI with SolidQueue async jobs (v0.28.0)
Wikidata integration for account enrichment
Social media platform support (Zoom, Teams, Signal, Bluesky)

Pros & cons

Pros

  • Completely free under MIT license
  • Actively maintained — v0.28.0 (April 2025) includes Rails 8 upgrade and new UI
  • 3.6k GitHub stars — established Ruby community
  • Extensible via Rails Engine plugins
  • JSON-LD automatic data population and Wikidata enrichment

Cons

  • Ruby on Rails stack limits audience to Rails-capable teams
  • Relatively modest feature set compared to full-suite alternatives
  • No built-in marketing automation or multi-channel inbox
  • No official hosted/cloud offering
  • Small developer team — mostly maintained by community

Detailed Information

No information available for Inventory Tracking Methods.

Best For

Ruby on Rails teams wanting a self-hosted CRM with a familiar stackSmall businesses needing a lightweight, free CRM with no ongoing feesDevelopers wanting an easily customisable CRM via Rails plugins

Not ideal for

Teams outside the Ruby/Rails ecosystemOrganizations needing advanced marketing automation or multi-channel communicationEnterprise teams requiring complex RBAC or SSO out of the box

Integrations

Heroku
MySQL
PostgreSQL
ImageMagick
Wikidata
Zoom
Microsoft Teams
Signal
Bluesky
Mastodon

ROI Calculator

Frequently Asked Questions

Quick Navigation

0 verified users

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Additional Information

Category
sales-pipeline
Price Range
Free (self-hosted, MIT license)
Pricing Model
open-source

Company Information

github.com/fatfreecrm/fat_free_crm